diff --git a/tools/doc/html.js b/tools/doc/html.js
index 22a793c3394bd1..b6e8866c247d55 100644
--- a/tools/doc/html.js
+++ b/tools/doc/html.js
@@ -211,7 +211,8 @@ function altDocs(filename) {
   }
 
   const versions = [
-    { num: '8.x' },
+    { num: '9.x' },
+    { num: '8.x', lts: true },
     { num: '7.x' },
     { num: '6.x', lts: true },
     { num: '5.x' },